Personally I only toke using carts. I find it a much cleaner "healthier" way of consuming cannabis and I really really enjoy it. I now toke way more than I used to when I was smoking flower and it's a lot more potent. I definitely recommend changing brand and vendor and highly recommend sn2d.
I've researched extensively into the brands that are sold through sn2d and would add select as another brand.
Yes, be weary and use a degree of common sense but as a good friend said to me when I brought up the issue of the carts that we are using could be fake, he responded by saying "he doesn't feel any different and isn't sprouting extra fingers or toes and will continue to smoke carts". I've never looked back.
Good luck, with your journey on finding what works for you because it could just be that carts are not for you.